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pepsi cola
he was trying his hand at construction
1. The professor is trying to teach his student about independent thought.
Harry thought that Professor Severus Snape was trying to steal the stone for Lord Voldemort. It was actually Professor Quirrell.
awesomeness
No. Professor Snape knew that Professor Quirrell was trying to steal the Philosopher's Stone and was trying to protect it.
Sunlight.
that means he is trying to say your personalaty
You cannot produce Switzerland. Trying to produce Switzerland is like trying to produce Germany.
Professor Quirrell was acting to prevent anybody from suspecting him.
Professor Quirrell was jinxing the broom trying to make Harry fall off. Professor Snape was trying to keep him on it.
Professor Quirrell was trying to find out what was behind the door, he didn't actually get close enough to get bitten. Professor Snape was the one who got bitten as he tried to stop Quirrell.